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3 Sheets-Sheet 1.`

(No Model.) Y

\ Gr. E. ELLIOTT.

STBAMAGTUATED VALVE. A

f--No 283,226. "PatentedAug 14, 1883.

WITNESSES Y A l Harney/s N. ruins. mwumgmpm. www". At;

(No Model.) Y v y Sheets-Sheet 2. G. E. ELLIOTT.

\ STEAM A-GTUATBD VALVE. No. 283,226. Patented Aug. 14, 1 883.

WITNESSES (Na Model.) s sheets-sheet 8. G. E. ELLIOTT.

STEAM AGTUATED VALVE.

120,288,228. 8 Patented Aug. 14, 1888.

WITNESSES- l v Attarn y@ T ol/ZZ whom, L'' may concern:

UNITED .STATES PATENTYV OFFICE.

GEORGE E. ELLIOTT, OE oALAIs, MAINE, AssIGNOE or ONE-HALE T O EDWARD J.OEANGLE, OEsAME PLAGE.

STEAM-ACTUATED vALvEJ SPECIFICATIG forming part of Letters PatentNo.283,926, dated August 14, 1889, Application mm1 Apin eo, icas. 'm0amaai' Be it known that'I, GEORGE E. ELLIOTT, a citizen of the UnitedStates offAmerica, resid-` ing at Calais, inthe county ofVashington andState of Maine, have invented `certain new and useful Improvements inSteam-Actuated Valves for DirectActing 'Steam-Pumps and I do herebydeclare the following to be a full, clear, and exact description of theinvention,

such as'will enable others skilled inlthe art `to which it appertainstogmake and use the same. n

This invention relates to that class of steampumps knownasdirect-acting,"7 and it has for its main obj ects to arrange the main1and auxiliary valves on the same plane, and to obviate certaindifficulties pertaining` to thework- `struoted according to myinvention.V

` the peculiar arrangement of the parts.

ing of steam-pumps of this class.

My improvement consists in the novel `construction, combination, andarrangement of parts, as will be hereinafter more fully set forth.

In the annexed drawings, Figure l is a per; spective view of the steamend oi the pump. Fig. 2 is a-view in longitudinal vertical section ofthesteaml end of a steam-pump con- Fig. 3 is a plan view of asteam-cylinderwith the main and auxiliary valves in position. Fig. 4 is a plan view ofa steam'cylinder embodying some of my improvements, the main andauxiliary valves being removed, so as to expose Figs. 5 and 6, are viewsof the auxiliary, valve. Figs. 7 and 8 are views ofthe main valve, andFig. 9 is an interior view of the steam-chest head, showing the recessfor the cushion valve.

In Fig. l ofthe drawings, the letter Arepresents the general form andarrangement of the pump, which may be of any suitable 4size andconstruction, equipped with my improvements. r l

The cylinder B is formed with a valve-seat, B, provided with a pluralityof ports,arranged as follows: Situated at one side of the seat (seeFigs. 3 and 4') is the steam-supply port G. Near the center are theusual inlet-ports,

D D", leading into the ends of the cylinder,

On the valveseat, adapted to travel over the ports D D E,

is the main or slide valve H, which is prei'- erably ofthe usualD-valVecIass, and alongside 0f this main valve, adapted to travel overthe auxiliary ports b b andexhaust-port a, is n arranged the auxiliaryvalve I, as shown in 1 Fig. 3. This valve I on its under side is formedwith alongitudinal cavity, d, and end cavities, e c, leading into eachother, as shown in Fig. 6, and on its upper side with a trans versegroove, f, and a slot, @leading into the same for the passage andreception of thel valve-stem fi and its head. This cylinder andthesteam-chest (see Figs. 2 and 4) are also constructed with auxiliaryports c c for leading live steam into and exhausting the dead steam fromthe chamber containing the auxiliary piston K. These auxiliary ports c care provided with lateral branch ports d d, leading to verticalescape-passages c c2, the former being provided with eushion-valvesj" f,opening into the steam-pockets formed in the head of the auxiliarysteam-chest. The Office of these branch passages d We" e2 with thevalves f f is to admit the steam to the interior of the auxiliary-pistonchamber after the auxiliary valve has closed the port, and to provide asteam-cushion at each end to lessen the force of the stroke against thehead. The side bar, k, of the valve connects the open ends and affords abearing for the valve.

More particularly describing the chest-piston or piston-valve K, whichis located within shown in the position that they assume when the pistonis at its extreme right-hand stroke, l in which position live steam isadmitted through the right-hand port, D, to the cylinder to act upon theright face ofthe piston, and as it so acts and forces the piston to theother end of the cylinder, the dead steam on the left of the piston isdischarged through the port D, under the D-shaped valve, and through theexhaust-port in the usual Inanner. The arm p of the main valve fits'into a slot formed in the centralportion of the auxiliary piston, andthe valve is operated by the reciprocating movement ofthe auxiliarypiston. The auxiliary piston is operated by the force of the steam letthrough the auxiliary ports c c, one being closed in the course oftheauxiliary piston, and steam is admitted up` through the smaller branchports leading therefrom up through the cuslIion-valve ports, therebycausing ,the auxiliary piston to move when the auxiliary valve I hasmoved to admit the steam in the auxiliary ports. Thestrokes of theauxiliary piston in either direction are checked by the action ofthesteam-cushion, which traps the exhaust-steam after the auxiliary pistonhas traversed by and closed the port, thereby Inaking asteam-cushionwith force sufficient to prevent the auxiliary piston from striking thehead with force. rlhe auxiliary valve is operated by the tappet-arm onthe main pistonrod, .and in the drawings, Fig. 3, is shown in positionto admit steam to the ri ght-hand port, and exhausting from the left-hand port th rough the exhaust-port proper.

I claim the right to vary the construction of parts vwithout departingfrom the spirit of the invention.

VVhatI claim as my invention, and desire Io secure by Letters Patent,is-

1. A steam-chest the heads whereof have steam-pockets formed in theirunder side opening into the interior of the auxiliary steamchest, andcommunicating with auxiliary ports through branch ports provided withvalves opening into the steam-pockets, in combination with an actuatedpiston-valve, substantially as described.

2. In combination with a valve-seat carrying a main valve and anauxiliary valve Inovadapted to admit the movement of a vertical valve,substantially as and for the purpose set forth.

5. An auxiliary valve, I, for avalve-seat of 7 5 a steam-engine, formedon its under side with a longitudinal cavity, d, and end cavities, e e,leading into each other, substantially as shown and described.

In testimony whereof I n'lysignature in presence of two witnesses.

GEORG-n A EDMUND ELLIOTT.

\Vitnesses:

GEo. H. BOARDMAN, WILLIAM F. BOARDMAN.

